Gas-cooler.



G. ESGHELLMANN & A. HARMUTH.

GAS COOLER.

APPLIOATION FILED AUG. 29, 1911.

Patented Nov. 18, 1913.

2 SHEETS-SHEET 1.

WITNESSES ATTORNEYS G. ESGHELLMANN & A. HARMUTH.

GAS COOLER.

APPLICATION FILED AUG 29, 1911.

1 07 41 Patented Nov. 18, 1913.

2 SHEETS-SHE11T 2.

WIT/1158858 l/Vl/E/VTORS ATTORNEYS GEORG ESCHELLMANN AND ALBERT HARM UTH, or s'r. PETERSBURG, RUSSIA, Ass mN- one T GENERAL CHEMICAL COMPANY, on .NEW YORK, N. Y., A CORPORATION or NEW YORK.

rota-ear. f

To all whom 2'25 may concern:

Be it known that we, GEORG EsCHEL MAN furnaces and "in particular to the coo-ling of gases produced by the roasting of iron pyrites or other sulfur bearing ores and intended to be used in the manufacture of sulfuric anhydrid by the contact process. As is known, it'is a very difiicult practical prc-blem'to 0001- such gases quickly and completely while preserving the material of the apparatus, since roasting or calcination gases contain acid gases and liquids in the form of mist which condense and attack such material. Q Attempts. have been made to efi ectothe coolingby means of towers (after the style of the Glover tower used for denitratin in the chamber process), the sulfuric aci which is caused to trickle or descend through the tower being cooled after leaving the tower and being pumped back into the same.

Apart from the complication and expense occasioned by the pumping, thecacid becomes laden with dust which is carried in considerable quantities by the gases, so that the acid cannot be used :over again continuously without the interposition of suitable settling devices.- For this reason the employment of sulfuric acid] towers for cooling pyrites burner gases for use in the contact process has in some cases not proven satis 'v factory.

Indirect cooling of the hot pyrites burner gases, (which are usually at a temperature of-"abut 500 {1), by means of tubular coolers, is subject to the disadvantage that the.

lead cooling tubes are in part rapidly destroyed by the deposition of heated sulfuric acid upon them together with the separation of dust which is thereby facilitated and which forms a more or less difficultly removable crust on the tubes. Moreover tubular coolers are not always easy of access for repairs.

According to the present invention the hot gases from pyrites kilns can be cooled according to the indirect method, and without any of the above additional devices or GAS-COOLER.

I pipen for the same.

steps, by employing, instead of tubular coolers, plate coolers composed of series of upright hollow cooling plates through which the cooling agent flows, as shown in one. constructional example in the acompanying drawings.

Figure 1 is a vertical section of our apparatus, the left half of suchfigure being a vertical section on line CVD of Fig. 2, and

the right half a vertical section on line DE of Fig. 2. r

The upper half of Fig. 2 is a horizontal section on line AB of Fig. 1, while the lower half is a half plan view of the appa ratus.

The apparatus consists of a cylindrical cooling chamber a; a preliminary or distributing chamber 1'), having a cover I), a crown or pipe d provided with a cover 0 and a side opening. d through which the burner gases are admitted from above .into the chamber 5; and a collecting chamber f provided with an outlet 6 for the cooled gases, this collecting chamber being open at the bottom and dipping into a trough g filled with acid which trough serves to catch acid that condenses and thus forms a hydraulic seal for the cooler.

- The cooling chamber is built up of a number of superposed annular sections it suitably oined together at their flanges, and each containing several series (three b way of Specification of Letters Patent. Pat ented NOV. 18, 1913. Application filed August 29, 1911'. $eria1No. $16,613. i

example in the drawing) ofuprig t hollow plates-i correspondingly arranged. These plates do not occupy the full height of the annular segment to which they appertain,

and they are supported-by stays 7c.

The cooling chamber a and distributing chamber 1) areinclosed by a casing Z which is connected at bottom to a supply pipe m for cooling water and .at top to an putlet cates with the cooling plates i at their top and bottom-parts by series of slots 0. The top wall of the cooling plates is upwardly inclined from the interior toward the ex terior of the apparatus. The distributing This casing communi chamber 7) and the collecting chamber f are likewise built up' of annular segments h, and a number of pipe unions p, normally closed. are provided around the circumference of the cover b of the distributing chamber 6, to enable fiushingwater'to be run in.

With the exception of the casing Z, which should be of wrought iron, the apparatus is constructed of lead, preferably pure cast led through the pipe m into the bottom of.

the-casing'l, in which it rises, at the same .time flowing through. the cooling plates, and it flows off at top through the pipe at.

Air bubbles which may form in the water in the cooling plates are led ,off by the upward inclination of the top walls of the same toward the circumference. The sulfuric acid which condenses on the cooling plates falls into the trough g from which the surplus acid runs 6ft freely. For rinsin or flushing the cooler, water is admitte through the pipe unions 7) on the cover and runs ofi through 9 laden with the sludge washed off the cooling plates.

By means of the plate cooler described, the hot gases from pyrites kilns which have a-temperature of about 500 (lean be cooled down to ordinary temperature in one passage through theapparatus. By reason of this rapid and intense cooling, a very good separation of the sulfuric acid present in the gases in the form of mist is attained. Sludge .does not bake on to the cooling plates, but can be easily rinsed .ofi' them.

It has been found that it is sufficient to flush the apparatus at intervals of from 4:

to, 6 weeks. There is no risk that the apparatus will become choked. On taking off thecover '0, the cooler is readily accessible through the pipe or crown d for any kind of'repa-irs.

Notwithstanding its simplicity of construction and the small space occupied, the apparatus provides a large cooling surface.

It is verydura-ble and 'is simple and cheap to operate. j

We do not limit ourselves to the exact construction shown in the drawings, but desire it to be understood that many modifications of construction and arrangement can be made without departi from the spirit of our invention as define in the appended claims.

Having now. particularly described the nature of our said invention, we declare that what we claim is 1. A cooling apparatus comprising superposed sections, each" section comp-rising an outer casing and hollow partitions walls wvithin said casing and dividing the latter into a plurality of separated compartments, the compartments of each section being in communication with the corresponding compartments of adjoining sections and the hollow portions of said partition walls being in communication with the exterior of the casing. I

2. Acooling apparatus comprising a gas conducting tower having partitions each partition being composed of lead and comprising walls and cross stays extending between said walls to hold them in separated relation, the space between said walls being in communication with the exterior of the tower. Y

3. A cooling apparatus comprising a vessel, a cooling jacket therefor and a hollow plate within said vessel, the hollow portion of said plate being in COIIHIlllIllCilt-lOIl Wlth said jacket and the upper wall of said hollow portion being inclined upwardly outward.

- 4. A cooling apparatus comprising a gasconducting tower having partitions com'prising a series of hollow cooling blocks and a cooling jacket surrounding said towerand being in communication with the hollows of said partition blocks.

In testimony whereof, we have hereunto set our hands in the presence of two subscribing witnesses.

GEORG ESCHELLMANN. ALBERT HARMUTH.

Witnesses: I

L. HOLTZHAUER, AUG. MIGHIS. 

